WEST PALM BEACH, Fla. — By 8:30 a.m., the contents of Kyle Tucker's locker had been cleared out, down to the “Ted” nameplate atop his stall. A clubhouse attendant folded his chair and tucked it inside. For the Astros' best position player prospect, Sunday morning marked the end of his time in major league camp.

Tucker settled into a new locker on the minor league side of the team's spring training complex, where he will spend the next week. The purpose of inviting him to camp was always to expose him to his future coaches and teammates, not for the 21-year-old outfielder to compete for a spot on the opening day roster. But in his month with the Astros, he left “a very, very positive impression,” manager A.J. Hinch said.

“He's going to be a part of this team, and he's going to be a big part of our future,” general manager Jeff Luhnow said. “He had a terrific spring, but our plan from the very...

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